Update docs for Consul metadata support

docs/user/services.md

@@ -53,7 +53,7 @@ These can be implicitly set from the Dockerfile or explicitly set with `docker r
 You can also tell Registrator to ignore a container by setting a
 label or environment variable for `SERVICE_IGNORE`.
 
-If you need to ignore individual service on some container, you can use 
+If you need to ignore individual service on some container, you can use
 `SERVICE_<port>_IGNORE=true`.
 
 ## Service Name
@@ -93,8 +93,10 @@ Docker-assigned internal IP of the container**.
 ## Tags and Attributes
 
 Tags and attributes are extra metadata fields for services. Not all backends
-support them. In fact, currently Consul supports tags and none support
-attributes.
+support them. In fact, currently Consul supports tags and more recently as of
+version 1.0.7, it added support for attributes as well in the form of
+[KV metadata](https://www.consul.io/api/agent/service.html#meta) but no other
+backend supports attributes.
 
 Attributes can also be used by backends for registry specific features, not just
 generic metadata. For example, Consul uses them for [specifying HTTP health